SSIDChanger – PCAP Wi-Fi SSID Modifier

SSIDChanger is a Python tool that parses a .pcap file, identifies Wi-Fi Beacon and Probe Response frames, and interactively allows you to rename their SSIDs. This is useful for anonymizing wireless captures before sharing them (e.g., in CTI, DFIR, training, or CTF challenge development).

The tool uses Scapy to read and write packets and ensures modified packets preserve structure and length.

✨ Features

• Extracts and modifies SSIDs from:
  • Dot11Beacon
  • Dot11ProbeResp
• Interactive SSID replacement prompt
• Optional exclusion list (skip selected SSIDs)

📦 Requirements

• Python 3.8+
• Scapy

Install dependencies:

pip install scapy

🧰 Usage

Basic example

python main.py -f my_capture.pcap

You'll be prompted for each SSID detected.

Exclude specific SSIDs

Skip modifying specific SSIDs:

python main.py -f my_capture.pcap -e 'Don't touch me'

Specify output filename

python main.py -f my_capture.pcap -o cleaned_capture.pcap

⚙️ Command-line Arguments

Argument	Description
-f, --file	(Required) Input pcap file
-e, --exclude	SSID names to skip (space-separated)
-o, --output	Optional output pcap filename

Example:

python main.py -f my_capture.pcap -e HomeWifi CorpNet IoT -o sanitized.pcap